Friction stir welding tool assembly



FIG. 1 is a front view of a friction stir welding tool assembly in accordance with the new design.

FIG. 2 is rear view thereof.

FIG. 3 is a left side view thereof.

FIG. 4 is a right side view thereof.

FIG. 5 is top view thereof.

FIG. 6 is a bottom view thereof; and,

FIG. 7 is perspective view thereof. 

CLAIM We claim the ornamental design for a friction stir welding tool assembly, as shown and described. 